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One alternative is to install the filter on the network path to the Internet router. In this configuration, two network cards are used. All Internet traffic passes through the filter box on its way to and from the Internet. In this situation it is not necessary to use the browser proxy service to install the filter. In this configuration the filter is a bridge between two subnets. Therefore a subnet has to be introduced an certain fixed paths established in the router at the time of installation. However, the avoiding the maintenance of proxy addressing on the routers offers considerable savings.
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